Safety-valve for fluid-pressure mains.



J. R. CABLE.

SAFETY VALVE FOR FLUID PRESSURE MAINS.

APPLICATION FILED 050.21. I9I3. RENEWED APR. 5. 1915.

1,139,952. Patented May18. 1915.

MIA/E5553 ENTOR THE NORRIS PETERS CO PHOTO-LITHO., WASHINGTON. D. C.

To all whom, it may concern E ana ram JAMES RJCAIBLE, or, TOLEDO, on rd'assreivon TO PETER rnrEnsnN, or 'ronnno, ionic.

SAFETY-VALVE FOB amp-Pan aea MAIivs.

- Specification of Letters Patent.

Application filed December 27, 1913, Serial No. 808,959. Renewed April 5,1915. srial'no; 19,3 16. 1

- Be it known that I, JAMES R,:OABLE, a citizen of the United States, and afresident of Toledo, in the county of Lucas and State of Ohio, have inventeda certain new and useful Safety Valve for Fluid: Pressure 7 Mains; and I do hereby declare the follow ing to be a full, clear," and exact description tothe accompanying drawings, and-to the of the invention, such as will enable others skilled in the art to which it appertains to "characters of reference marked thereon, which'form a part of this specification.

My inventionrelates to valves and has-for its particular object to produce a valve which will automatically close when the gas pres 7 sure in the gas main reducesbelow a certain amount and which will also automatically close when the outlet is closed; It provides a safety device which will close ofl the burner connection to a stove or a furnace when the pressure in the main falls below a certain amount and also when the'burnervalve is closed sothat when the gas is turned on in a heater,vsuch as a furnace, for thenight if thegas inthe main should, fall below a certain pressure, the automatic valve will operate to close the gas off, and also when the trates a sectional view of the valve showing burner valve is closed, if it is accidentally opened the automatic valve will operate as safety to prevent escape of. gas. a a 1 v r I The invention may be contained in a great Y variety of structures. w I haveiselected one construction and shall describe it hereinafter to illustrate how suchconstruction may be" made and operated.

The construction described is shown in the drawings wherein Figure 1 illustratesa sectionalview of an automatic valve whenclosed and'Fig. '2 illusthe valve open. I I

, 1, Fig. 1, is the valve body, and 2 is the gas main. c 3 is the outlet leading from the valve; The valve body is provided with a 'frustoconical chamber 10 which contains an inverted cup 11 having substantially the same conical inclination that the chamber 10 has so that when the cup 11 is positioned at the lower end of the chamber 10, it will tightly fit the chamber. The chamber 10 isc apped by the cap 12 having a spherical surface which is adapted to hold the cup 11 central 'by the action of 'the gas rising inthe cham- Patent ir y'is, 191 51- ber 10 which strikes the spherical surface a it the cap 12 and glances tothe corners formed to increase the pressureof the 'gas in the cor-.

13 terminates at the sideiof the cup when the cup isin its lowest position in thechamber It is effectually cutoff when the'cup 11 is in itsllo'west position. Anqoutlet'15 ex tends diagonally downward from thetop bf the chamber 10 and communicates .withthe'. i,

socket '16 in which the outlet ,to the burnerpipe 3 is connected.

A narrowpassage-way 17 provided which extends to a point near, theibottom 'of the-chamber 10 and near the lower; edge ofthe cup 11 when the cup is in its lowest-position. This affords at all times some-com munication between: the pipes 2 and'3 when the'pressure is..low and until the cup11'f alls to its lo'westipositi'on. A ventis located v in the upper endof the cup' ll which'pe'rv mits the gasto passout through the cup and f- I thecup 11 when the cup llis locatedlinthe f upper or intermediate part of thejchamber It also operates to"allowfthe gasto a V freely pass from below to above the cup so 9o I "of'itslown Weight. It will cause it t'o'sea't 5 3 thus form a circulation of the gaswithin as to; allow the cup todrop freelyby reason squarely and quickly on; the bottoin ofthe' chamber. It permits thecup to fall and strike with I some little impact or 7 click "on thebottom of the chamber.

v. I A pin 20 having a "handle 21 is mounted in the'lowerlend' of the valve body 1 and L sets into a socket to further close the opencup 11 and pushes it to the top of the chamber 10. As soon as the gas passes upward is provided with a; suitable packing ring i and material-22. If desired, a ball-23 mayv v be secured to the end of the pin 20 which v ing about .the pin. In order to open the valve the pin 20 is raised which pushes on] v the bottom of the cup 11 which raises the through the'port 13 it immediately passes through the narrowpassage-way. 17 which under normal pressure immediately raises the cup 11 and pushes it upward by the movement of the gas in "and about the cup and holds it tothe top' of the chamber 10.

In the use of the device, the burner valve 30 connected in'the outlet pipe 3 is first opened and then the pin 20 is pushed upward so that the ball 23 presses against the bottom of the cup 11 and raises the cup 11 a short distance whereupon the gas will flow through the pipe 3 and the cock 30. If the pressure in the main falls to such a degree that the movement of the gas through the automatic valve will allow the cup 11 to fall by reason of the weight of the cup 11, the gas willbeautomatically closed oii'. If the gas valve is closed, accidental opening of the burner valveBO will not permit the gas to escape through the automatic valve and.

burner.

The invention may be modified by those skilled in the art without departing from the spirit thereof.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is,

l. The combination of a casing having a frusto-conical chamber, a frusto-conicalcup movable in the chamber, the chamber having an inlet port closed by the wall of the cup when the cup is in its lower position and an outlet port located in the upper-end oi the chamber, and a channel extending from above the cup to a point near the lower edge of the cup when the cup is in its lowermost position.

2. The combination of a casing having a frusto-conical chamber, an inverted frustoconical cup located in the chamber, the chamber having an inlet port closed by the wall of the cup when the cup is in its lowermost position, means for directing an incoming fluid upward, the chamber having an outlet port located in its upper end, and a channel extending from the upper end of the chamber to the lower end of the chamberand to a point near the lower edge of the cup when the cup is in its lowermost position.

3.- The combination of a casing having a frusto-conical chamber, an inverted frustoconical cup located in the said chamber, the

bottom of the cup having an opening, the chamber of the inlet port closed by the wall of the cup when the cup is in its lowermost position, the chamber having an outlet port located at its upper end, the chamber having a channel extending from the outlet port to a point near the lower edge of the cup w ien the cup is in its lowermost position.

4i. In an automatic valve, the combina tion of a body having a frusto-conical chamber, a frusto-conical inverted cup located in the chamber, an inlet port inclined upward and having its inneropening located below the bottom of the cup when the cup is in position to close the chamber, an outlet passage eXtending to a point near the lower edge of the cup when the cup is in closed position, a mechanical means for raising the cup, the cup being held in an open position by the circulation of the fluid therethrough and the cup having a pointed bottom the upper end of the said chamber being provided with a spherical surface the cup being centered in its uppermost position by the movement of the gas in the said chamber.

5. In an automatic valve, the combination of a body having a frusto-conical chamber, a frusto'conical inverted cup located in said chamber, an inlet port inclined upward and having its inner opening located below the bottom of the cup when the cup is in position to close the chamber, an outlet passage extending to a point near the lower edge of the cup when the cup is in closed position, a mechanical means for raising the cup, the cup being held in an open position by the circulation oi the fluid therethrough, said valve having an outlet port extending diagonally downward from the upper end of the chamber.

I In testimony .whereof, I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

, JAMES R. CABLE.

Witnesses C. A. JACOBS, C. W. OWEN.

'C'opies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

